Science & Mathematics - 10 September 2007

Also how long would it take to get there traveling at the speed of light?

2007-09-10 12:28:06 · 11 answers · asked by Fortis cadere cedere non potest 5 in Astronomy & Space

i'm ordering tape( invisible tape/Transparent tape) for tape some sterling silver chain. will the non acid-free tape damage my silver chain?

2007-09-10 12:25:03 · 2 answers · asked by carol 1 in Chemistry

Need a basic list of negative effects of coal mining and fast essay due tomorrow.

2007-09-10 12:23:29 · 5 answers · asked by cinderella 2 in Earth Sciences & Geology

What is your favorite geography trivia question? I’m just curious.

My favorite: What country is closest to the US after Canada and Mexico? The answer is Russia, but most people don’t think of it.

2007-09-10 12:20:32 · 5 answers · asked by Amy W 6 in Geography

the density of a piece of metal alloy is 4.35 g/cm cubed. what is the volume of 53.7 kg of this metal? density = mass/volume

2007-09-10 12:18:21 · 4 answers · asked by xoo_christina_77 1 in Chemistry

I have river in my farm garden.. It is sometimes fast and sometimes slow. I need electricity (for home lamps etc.) How can i find the design and project of electric generation from this river? I need explanation step by step. Bec i am doctor. I am planning to design it by myself. Thank you if you know.

2007-09-10 12:17:13 · 5 answers · asked by Dr Fatih 2 in Engineering

In evolution there is general agreement that a matter turned into different matter (single cell-worm-fish-lizards-et... Now if the theory is based on these matters evolving on there own, where did that matter come from in the first place?.It can't have simply been there. Someone had to have made it who doesn't live under the laws of our universe. Because of this view point (and others), I find it hard to believe this theory and that there is not a Creator of some sort.

2007-09-10 12:16:35 · 15 answers · asked by Labrynth 1 in Astronomy & Space

First graph has two arrows.
A line with an open circle at
(-2,2) going left forever horizontal.
another line with close circle at (-2,-2) going right horizontal forever.

second graph is just like the one above except that both start with open circles.

Third graph is strange because it does not have a circle but from that perticular point two arrows come out of it, with out circle or point. At (-2,2) one arrow goes right horizontal forever and the other one from again (-2,2) goes down at an angle hitting the x axis at (-4,0). It kinda looks like
3:40 on a clock. with (-2,2) in the middle.

Fourth graph has same starting point. there are two arrows from (-2,2).One is going down at an angle hitting the x axis at (-3,0). The other arrow is kinda strange because it starts from (-2,2) but then bends to the right alittle at (-1.5,2) then goes up till it hits the y axis at (0,6).

The question that i have is does the limit exist at x= -2

really need your help

2007-09-10 12:10:46 · 2 answers · asked by fvsdf s 2 in Mathematics

the big bang theory happened 15 million years ago.how might scients been able to determine this?

2007-09-10 12:10:18 · 9 answers · asked by **ic** 4 in Astronomy & Space

Find the Interest on $1500 for one year at the following rates of interest (A, B, C)

A- 12%

B- 8.5%

C- 3%

2007-09-10 12:07:14 · 2 answers · asked by Anonymous in Mathematics

How do u solve 9 x 4 1/4?
9 times 4 and one fourth.
???

2007-09-10 12:05:46 · 12 answers · asked by Loveable 1 in Mathematics

im doing a science project and i have toexplain how sunflowers are vascular.Plz smart people help!!

2007-09-10 12:04:18 · 1 answers · asked by lovemybae(: 1 in Earth Sciences & Geology

the compressed air/c02. this impact drives the paintball out the barrel. my question is why isnt the paintball driven by say a butterfly valve opening and allowing the gas to expand and push the ball out the barrel. it would seem more efficent to have the ball driven by direct expanding gas, like a car piston, if you could get the sealing right. rather than have it struck by a piston, and deal with frictional losses, etc. can someone explain to me what im missing?

2007-09-10 12:02:35 · 3 answers · asked by mrx 1 in Physics

2007-09-10 12:01:46 · 2 answers · asked by Meg 1 in Geography

Suppose that f(x) is a function with f(100) = 35 and f '(100) = 3. Estimate f(102).

2007-09-10 12:00:56 · 2 answers · asked by i<3WL 2 in Mathematics

2007-09-10 12:00:51 · 5 answers · asked by Meg 1 in Geography

I heard that before at school but I don't think Its true. Some people say its true but some people say its not. Which is true?

2007-09-10 12:00:05 · 13 answers · asked by Anonymous in Medicine

(a) the side opposite the 20.0° angle ?

(b) the side adjacent to the 20.0° angle?

2007-09-10 11:58:43 · 2 answers · asked by Foxychick 1 in Physics

I posted earlier, but I'm stuck on this one ......I'm having trouble with velocity and how to find the displacement. I know the formula, but I dont know how to find it within the questions. Help me out with this question, give me the formula, and plug in the numbers to get the answer. Thanks

1. An athlete swims from the north end to the south end of a 50.0 m pool in 20.0 s and makes the return trip to the starting position in 22.0 s. a.)What is the average velocity for the 1st half on the swim. b.) Average velocity for the 2nd half of the swim. c.) Average velocity for the roundtrip?

2007-09-10 11:58:31 · 1 answers · asked by neverisenough 1 in Physics

Right now I have it in a glass bowl with a little bit of water and some dirt. He's moving around and looks really happy, but do I need to put him in something bigger? More water? What all do they eat?.....and some jerk accused me of taking it from the wild. I DID NOT take the egg from the wild. My aunt and uncle's neighbor found about 5 of them in his backyard...NOT in hole. He's hatched and I'm going to let him go soon. I just want to know what do I do with him for the few days I'm keeping him?

2007-09-10 11:57:29 · 2 answers · asked by guitar_girl0708 1 in Zoology

Lithium has two naturally occuring isotopes. Lithium-6 has an atomic mass of 6.015 amu, and lithium-7 has an atomic mass of 7.016 amu. The average atomic mass of lithium is 6.941 amu. What is the percentage of naturally occuring lithium-7?

How do I work this problem to find the answer.

2007-09-10 11:57:04 · 1 answers · asked by Average Joes 4 in Chemistry

Given the equations x= x(sub 0) + v(sub 0)Xt + 1/2XaXt^2 and v= v(sub 0) + aXt (where the capital X means multiplied by) show that an expression for v that has no explicit dependence on time (i.e. the variable t does not appear in the equation) can be written as v = SquareRoot of V(sub 0)^2 + 2XaX(x-x(sub 0))

2007-09-10 11:56:14 · 1 answers · asked by Mick T 1 in Physics

I have been shown many ways to complete the square but nothing is making a connection how do you do it again could someone help me with the equation x(squared)-4x+4?

2007-09-10 11:54:27 · 4 answers · asked by casey_carnut_69@rogers.com 1 in Mathematics

2007-09-10 11:50:20 · 1 answers · asked by baby angel 1 in Physics

ok so i m really bad at math so i will also take tutoring offers :D

2007-09-10 11:50:04 · 1 answers · asked by indiadeknowitall 2 in Mathematics

A: T2 / L

B: L / T2

C:L * T2

D:L / T

E: L2 / L

2007-09-10 11:49:37 · 1 answers · asked by Foxychick 1 in Physics

2007-09-10 11:45:46 · 11 answers · asked by seekerjan 1 in Chemistry

2007-09-10 11:42:33 · 2 answers · asked by crunkjude619 1 in Mathematics

Problem Of the Week Suppose the hundreds digit of a three-digit number is greater than the tens digit and the ones digit. When the digits in the number are reversed and the resulting number is subtracted from the original number. The units digit in the difference is 4. What is the difference between the three-digit number and its everse? How many different three-digit numbers meet the given conditions?

2007-09-10 11:41:24 · 5 answers · asked by aroe 1 in Mathematics

It's a common recommendation these days that people should eat a lot of fiber for colon health, heart health etc. But as we know, foods that are high in fiber often cause flatulence. Beano contains an enzyme that breaks down certain sugars in foods that cause gas. But is Beano breaking down the chemicals that are supposedly good for colon and heart health? In this sense, could be Beano be undermining the health value of high-fiber foods?

2007-09-10 11:40:47 · 3 answers · asked by drshorty 7 in Biology